Add Xcode suggested GCC_WARN_64_TO_32_BIT_CONVERSION warning to Demo project
Merge pull request #199 from rivera-ernesto/add_suggested_warning_check

Add Xcode suggested GCC_WARN_64_TO_32_BIT_CONVERSION warning to Demo project
Comment cleanup / fix. #201
Merge branch 'master' of git://github.com/jdg/MBProgressHUD